Which political party did President James Buchanan belong to?

Jane Pierce was married to which president? Which number president was James Buchanan? Who succeeded James Buchanan as President of the United States? Who was President immediately before James Buchanan? Which president served from 1857 to 1861? In what year did James Buchanan first take office as President? In which state was James Buchanan born? Who served as Vice President under James Buchanan?